Posted: 11/21/2010 4:57:02 PM EDT
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I have a RRA NM rifle with the sloped '1-sided' NM front sight. Because you can only use one of the sides, I can't get my rifle to zero without raising the front sight to where it's above flush with the front sight tower. If I screw it in an entire revolution, I run out of rear sight adjustment. The front sight is held steady by the spring / detent. I have read and heard that it is best to have the front sight at least flush with the sight base, to keep the post steady. I can move it around (slightly, of course) by hand, but I can't see that it would have a tremendous amount of force applied to it when firing. I have shot it, and it seems to group just fine, but I'm not an experienced shooter so I really just don't know if it affects performance. Going to a standard, non-sloped NM sight would seem like an easy fix, as I can use more than one side.
So is this a non-issue? Thanks |
| The standard practice is to run a tap all the way through the hole where the front post sits and lock the front post with a set screw from below. Takes less then 5 minutes. The thread size is somewhat uncommon, but you can mail order it. It's 8x36 if I remember correctly. Brownell's should have a kit that includes the tap and a dozen or so set screws. It also includes a drill bit, but it is usually not needed. |
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Quoted:
The standard practice is to run a tap all the way through the hole where the front post sits and lock the front post with a set screw from below. Takes less then 5 minutes. The thread size is somewhat uncommon, but you can mail order it. It's 8x36 if I remember correctly. Brownell's should have a kit that includes the tap and a dozen or so set screws. It also includes a drill bit, but it is usually not needed. Hmm. I see, so regardless if the sight is screwed above flush with the sight base, the set screw snugged up to the sight post from underneath makes it steady. Thanks, I'll check it out. |
| When you say you run out of adjustment on your rear sight, I assume you mean down? If so, how far up are you with the front sight flush? Regardless, match FSB's have the threaded front sight hole for a stop screw and it's a good thing to lock it in place. As far as being "flush" goes, it makes no difference whatsoever, so adjust it the where you have the rear sight movement you want and lock it down. For what it's worth, I changed from a NM post to a standard one because my older eyesight likes some real estate on either side of the aiming black, and I also wanted to be able to adjust my front sight less than 1 1/4 MOA (which is what a full turn is). |